Chrome: Your inbox gets distracting (unless you keep it clean), and sometimes you just want to send an email without seeing everything else requiring a response. Open Compose lets you click a button and compose a message in Gmail, no distraction required.

Inbox zero: it's the impossible dream that gets further and further away as you let your…
Read more Read more

All you have to do is install the extension, then click the little Gmail button in your toolbar to get a new message. It serves a very specific purpose, but is a nice little shortcut to have if you just want to write an email and not worry about anything else.

(Of course, those of you not on Chrome—or who would just prefer a link—can bookmark this URL to go straight to the compose window, too.)